JP2000008473A - Method for laying drain pit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for laying a drain pit which can be assembled simply and surely in the site of construction of a piping and is also free of the possibility of breakdown even in the use for a long time. SOLUTION: A drain pit is made up of a rise tube 1, a flanged socket 2 and a pit bottom plate 3. The pit bottom plate 3 has a cylindrical part 32 coming down from the peripheral edge of a disk-shaped bottom wall 31 and is also provided with a circular groove 34 in which the lower end part of the rise tube 2 is fitted and with a circular-arc gap 35 in which the lower end part of a flange part 21 of the flanged socket 2 is fitted. A connecting hole 11 is bored in the lower side wall of the rise tube 1 and the flange part 21 of the flanged socket 2 is connected by bonding to the outer wall surface of the tube surrounding the connecting hole. Then, the lower end part of the rise tube 1 is pushed into the gaps 34 and 35 and joined thereto by bonding. Besides, a flange part of a saddle joint is connected by bonding to a connecting hole bored in an appropriate place of the rise tube 1 and an inflow tube is connected thereto, while an outflow tube is connected to a branch tube 22 of the flange socket 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for laying a drainage basin used for burying a drainage pipe on a slope or a stepped land.

[0002]

2. Description of the Related Art Japanese Utility Model Laid-Open Publication No. Hei 6-43485 discloses a drainage basin which can be used for connecting a drainage pipe to a slope or a stepped land. In this drainage basin, an outflow pipe 2a is welded to the lower side wall of the riser pipe 1a, and a raised bottom 3a having a concave curved surface is welded to the lower end side of the riser pipe 1a as shown in a partially cutaway sectional view in FIG. And a filler X such as sand or urethane foam is filled in a raised bottom space formed by the raised bottom 3a and the bottom plate 3b.

[0003]

However, in this conventional drainage basin, since the mounting positions of the parts are not clearly set, the rising pipe 1a has an outflow pipe 2a and a raised bottom 3a.
Not only takes time to connect when welding
There is a risk of parts being separated from each other and damaged by long-term use because they are not firmly joined. In particular, at the pipe construction site, the length of the riser pipe 1a must be determined according to the burial depth of the drainage basin, etc., or a connection hole must be formed in the side wall corresponding to the connection position of the inflow pipe. In the conventional drainage basin, the construction work becomes complicated, and a reliable and strong connection cannot be obtained.

The present invention has been made to solve the above-mentioned problem, and the drainage basin is composed of three parts so that assembly at a pipe construction site can be easily and reliably performed, and parts can be separated from each other even after long-term use. It is intended to provide a method of laying a drainage basin without a risk of being damaged.

[0005]

A method of laying a drainage basin according to the present invention comprises a rising pipe having a desired length, a flanged socket, and a cylindrical portion hanging down from the periphery of a disc-shaped bottom wall. An annular groove into which a lower end of the riser is fitted between a cylindrical support provided on an outer peripheral side of the cylindrical portion, and a flange of a flanged socket adhesively bonded to a lower outer wall surface of the riser. At the time of bringing the drainage basin consisting of a basin bottom plate with an arc-shaped gap into which the lower end of the bottom is inserted into the piping construction site and assembling it, a connection hole is drilled in the lower side wall of the riser, The flange portion of the flanged socket is adhesively connected to the outer wall surface of the tube surrounding the connection hole, and then the lower end of the riser tube is pressed into the gap provided between the cylindrical portion of the cell bottom plate and the support to be bonded and bonded. Drill into the right side wall of the riser The flange portion of the saddle joint outside the tube wall surrounding the connection hole and bonded connection connects the inlet pipe to the branch portion of the saddle joint, characterized by connecting the outlet pipe to the branch pipes of the flanged socket.

[0006]

Embodiments of the present invention will be described below in detail with reference to the drawings. 1 is a perspective view showing a deployed state of a drainage basin of the present invention, FIG. 2 is a rear view of a flanged socket, and FIG. 3 is a cross-sectional view showing a state where the drainage basin of the present invention is installed at a site. Reference numeral 1 denotes a riser made of a long synthetic resin pipe such as a PVC pipe. Reference numeral 2 denotes a flanged socket, and 3 denotes a bottom plate.

The flanged socket 2 has a flanged portion 2 curved in an arc shape.
1 is provided with a branch pipe 22 protruding from the convex side thereof.
1 is provided with a through hole 20 communicating with the branch pipe 22. On the back surface (concave surface side) of the flange portion 21, a locking projection 23 is provided at an upper portion of a peripheral edge of the through hole 20, and a connecting projection 24 is provided at a lower portion.

The leading end of the locking projection 23 is bent upward to have a hook shape.
When the connection hole 11 and the notch portion 12 are sunk and fitted, they engage with the inner wall surface of the riser tube 1. The connection protrusion 24 is formed in an arc shape along the periphery of the through hole 20, and can be fitted into the connection hole 11 of the riser tube 1. At this time, the connection protrusion 24
Is slightly protruded from the inner wall surface of the riser 1, and a chamfered inclined surface provided on the lower surface of the end can be rubbed and joined to an invert surface of a cell bottom plate 3, which will be described later.

The bottom plate 3 is an integrally molded product formed by injection molding of a PVC resin, and is provided with a cylindrical portion 32 hanging down from the periphery of a disk-shaped bottom wall 31. A horizontally projecting flange 36 is provided. A cylindrical support 33 is provided on the upper surface of the flange 36, and an annular groove 34 into which the lower end of the riser tube 1 is fitted between the support 33 and the cylindrical portion 32. An arc-shaped gap 35 is formed in which the lower end of the flange 21 of the flanged socket 2 bonded and bonded to the lower outer wall surface is fitted.

The upper surface of the bottom wall 31 of the bottom plate 3 is inclined in a mortar shape from the peripheral portion toward the central portion, and descends from the lowest central portion toward the center of the arc-shaped gap 35. Is formed. The invert 310 is formed in an arc shape in cross section,
An inclined surface 311 is provided at the terminal edge. An inclined surface provided on the lower surface of the distal end of the connection protrusion 24 of the flanged socket 2 described above can be rubbed and joined to the inclined surface 311 via an adhesive.

In the present invention, the riser 1, the flanged socket 2, and the bottom plate 3 are carried into a pipe construction site and then assembled as follows. First, the long riser 1 is cut into a predetermined length, a connection hole 11 is formed in a lower side wall of the riser 1, and a semicircular notch 12 is formed in an upper edge of the connection hole 11. Provide. Also, the inflow pipe 4
A connection hole 13 having a desired inner diameter is formed at an appropriate position on the side wall of the riser pipe 1 to which the connection is made.

Next, an adhesive is applied to the outer wall surface of the tube surrounding the connection hole 11 formed in the lower side wall of the riser tube 1 and the back surface of the flange portion 21 of the flanged socket 2. Therefore, the locking projections 23 of the flanged socket 2 are raised and the connection holes 1 of the pipe 1 are connected.
After being sunk into the notch 1 and the notch 12, the back surface of the flange 21 is strongly pressed against the outer wall surface of the riser tube 1 and bonded.

Next, an adhesive is applied to the inner and outer peripheral surfaces of the lower end of the riser tube 1 and the outer surface of the lower end of the flange 21 of the flanged socket 2, so that the gap between the cylindrical portion 32 of the cell bottom plate 3 and the support 33 is formed. The lower end of the riser 1 Then, the lower end of the rising pipe 1 is fitted into the annular groove 34 of the bottom plate 3 and is firmly adhered and joined. At the same time, the lower end of the flange 21 of the flanged socket 2 fitted into the arc-shaped gap 35 is The adhesive is firmly bonded to the support 33. In this connection state, the lower end of the flange portion 21 of the flanged socket 2 is covered with the support 33, and the locking projection 23 provided on the back surface of the flange portion 21 is engaged with the inner wall surface of the riser tube 1. . That is, since the inner and outer walls of the riser tube 1 are sandwiched between the locking projection 23 and the flange portion 21,
Even when an earth pressure or the like acts on the branch pipe 22 of the flanged socket 2 from above during the assembling work at the site or after the piping work, the flange portion 21 does not peel off from the outer wall surface of the riser pipe 1.

The drainage basin assembled in this manner is installed in an excavation groove formed by excavating the ground as shown in FIG. 3, and is provided with a connection hole formed at an appropriate position on the side wall of the riser 1. Saddle joint 5 on the outer wall of the tube surrounding
Adhesively connected to the flange portion 51. Therefore, the end of the inflow pipe 4 is inserted into the branch portion 52 of the saddle joint 5 and is connected to extend and contract via a seal ring. In addition, a socket provided at the end of the outflow pipe 6 is externally inserted into the branch pipe 22 of the flanged socket 2 and is connected to extend and contract via a seal ring.

At the end, the lid receiving frame 7 is mounted on the upper end of the riser pipe 1, the lid 8 is detachably mounted on the lid receiving frame 7, and then backfilled with excavated earth and sand. Work is completed.

In the above embodiment, the connection hole 11 is formed in the lower side wall of the riser 1 and the semicircular notch 12 is provided on the upper edge of the connection hole 11. Notch 12 may not be provided. In this case, the locking projection 23 provided on the back surface (concave surface side) of the flange portion 21 may be positioned slightly below, and the locking projection 23 may be engaged with the peripheral edge of the connection hole 11. .

[0017]

As described in detail above, the drainage basin of the present invention comprises a riser, a flanged socket, and a bottom plate, and the parts can be assembled easily and reliably. Even in the field, reliable and strong adhesive bonding can be obtained. For this reason, even if the ground changes due to an earthquake or the like after the construction, the parts are not separated and damaged, and the watertightness is secured in a stable state for a long time.

If a hook-shaped locking projection is provided on the back surface of the flange of the flanged socket, the inner and outer walls of the riser tube are sandwiched between the locking projection and the flange. The tube and the flanged socket are firmly bonded and bonded, and the flange does not peel from the outer wall surface of the riser tube even when earth pressure or the like acts on the branch pipe of the flanged socket from above.

Further, when a connecting projection is provided on the back surface of the flange portion of the flanged socket, the chamfered inclined surface provided on the lower surface of the tip of the connecting projection is formed by the adhesive and the invert surface of the cell bottom plate. Bonding without gaps.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a deployed state of a drainage basin of the present invention.

FIG. 2 is a rear view of the flanged socket.

FIG. 3 is a cross-sectional view showing a state where the drainage basin of the present invention is installed on the site.

FIG. 4 is a partial sectional view showing a conventional drainage basin.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Rise pipe 11 Connection hole 2 Flanged socket 21 Flange 3 Measure bottom plate 31 Bottom wall 32 Cylindrical part 33 Support

Claims (3)

[Claims] 1. A riser (1) having a desired length, a flanged socket (2), and a disc-shaped bottom wall (3).
A lower end of the riser tube (2) between the cylindrical portion (32) and a cylindrical support (33) provided on the outer peripheral side of the cylindrical portion (32); An annular gap (35) into which the lower end of the flange (21) of the flanged socket (2), which is adhesively bonded to the annular groove (34) into which the groove is inserted and the lower outer wall surface of the riser pipe (2), is inserted. When a drainage basin composed of a basin bottom plate (3) provided with a pipe is brought to a pipe construction site and assembled and constructed, a connection hole (11) is formed in a lower side wall of a riser (1), and then the connection hole is formed. The flange (21) of the flanged socket (2) is adhesively connected to the outer wall surface of the tube surrounding (11), and the lower end of the riser (1) is supported by the cylindrical portion (32) of the bottom plate (3). It is pressed into the gaps (34, 35) provided between the bodies (33) and bonded together. A flange portion (51) of a saddle joint (5) is adhesively connected to an outer wall surface of a pipe surrounding a connection hole (13) drilled at an appropriate position on a side wall of the riser pipe (1). 52) A method for laying a drainage basin, comprising connecting an inflow pipe (5) to an outlet pipe (5) and connecting an outflow pipe (6) to a branch pipe (22) of the flanged socket (2). 2. A flange (21) of the flanged socket (2).
Is provided with a hook-shaped locking projection (23) on the back surface thereof.
2. An inner and outer wall of a rising pipe (1) is sandwiched between the locking projection (23) and a flange (21).
How to lay the drainage basin described. 3. A flange (21) of the flanged socket (2).
An arc-shaped connecting projection (24) is provided along the lower edge of the through hole (20) on the rear surface of the connecting projection (20).
The tip of (4) slightly protrudes from the inner wall surface of the riser (1), and a chamfered inclined surface provided on the lower surface of the tip is adhesively bonded to the invert surface of the bottom plate (3). How to lay the drainage basin described.